I've been the same way. The only thing that worked well enough for me is melatonin; well, actually that or a lot of alcohol, which never fails. Melatonin sometimes help put me to sleep and the best part is that you don't wake up with that hangover you'd get from a regular sleeping pill.
Check to see what your average activity is right before you go to bed. If you're on the computer or phone, the glare from the screen can keep you awake and make it difficult to fall asleep. You can use a blue blocking computer glasses (with the yellow tint) or you can use a program like F.lux - https://justgetflux.com/
Doing exercise and other physical activities late in the afternoon helps to tire you out so you're more readily able to sleep all night. Reading a book without a lot of light glare also helps (the new Kindle Paperwhite is perfect for this.)
